MESON Chess Problem Database

Problem Display
PID: 231857 (8/7Q/8/1k6/RNR3K1/8/8/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1970

8/7Q/8/1k6/RNR3K1/8/8/8

#2

5 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Ra7?
      • 1...Kb6
        • 2.Qb7#
      • 1...Kxc4!
    • 1.Qe4?
      • threat
        • 2.Qc6#
      • 1...Kb6
        • 2.Qc6#
      • 1...Kxa4!
    • 1.Qg8?
      • 1...Kb6
        • 2.Qb8#
      • 1...Kxa4!
    • 1.Qd7+?
      • 1...Kb6
        • 2.Sd5#
        • 2.Ra6#
        • 2.Qc6#
      • 1...Kxc4!
  • Keys
    • 1.Sa2!
      • 1...Kb6
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • S(B);
    • Vars
      • K(a);P-FLIGHT::QAR(E)
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